Crystal Structures - Packing Efficiency Exercise
15 Jun 2010 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
Consider the most efficient way of packing together equal-sized spheres and stacking close-packed atomic planes in three dimensions. For example, if plane A lies beneath plane B, there are two possible ways of placing an additional atom on top of layer B. If an additional layer was placed...
Solve a Challenge for a PN Diode
08 Jun 2010 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This is SOLVE A CHALLENGE PROBLEM for pn-diodes.
Verification of the Validity of the PN Junction Tool
These simulations and comparisons with the depletion charge approximation prove the validity of the PN Junction tool.
Crystal Directions and Miller Indices
08 Jun 2010 | Contributor(s): David K. Ferry, Dragica Vasileska, Gerhard Klimeck
Miller indices are a notation system in crystallography for planes and directions in crystal lattices. In particular, a family of lattice planes is determined by three integers, l, m, and n, the Miller indices. They are written (lmn) and denote planes orthogonal to a direction (l,m,n) in the...
Crystal Structures
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a basis, a set of atoms arranged in a particular way, and a lattice. The basis is located upon the points of a lattice spanned by lattice vectors, which is an...
Tight-Binding Band Structure Calculation Method
This set of slides describes on simple example of a 1D lattice, the basic idea behind the Tight-Binding Method for band structure calculation.
PCPBT Manual
This is a manual for the Piece-Wise Constant Potential Barrier Tool.
Worked Examples for a PN Diode
01 Jun 2010 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
several worked examples are presented that illustrate the operation of a PN diode.
Nanotechnology Animation Gallery
22 Apr 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
Animations and visualization are generated with various nanoHUB.org tools to enable insight into nanotechnology and nanoscience. Click on image for detailed description and larger image download. Additional animations are also...
Tutorial for PADRE Based Simulation Tools
10 Aug 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This tutorial is intended for first time and medium level users of PADRE-based simulation modules installed on the nanohub. It gives clear overview on the capabilities of each tool with emphasis to most important effects occuring in nano-scale devices.
Exercise for MESFET: Simulation Exercise
03 Aug 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This simulation exercise is designed to illustrate the operation of a MESFET device for different doping of the active region.
Exercise for MESFET: Theoretical Exercises
These theoretical exercises should help the student in understanding the operation of a MESFET device.
Exercise for MOSFET Lab: DIBL Effect
In this exercise students are required to examine the drain induced barrier lowering (DIBL) effect in short channel MOSFET devices.
Exercise for MOS Capacitors: CV curves and interface and Oxide Charges
This exercise is designed to teach the students how the CV curves of an ideal MOS Capacitor change in the presence of oxide or interface charges.
BJT Lab: h-Parameters Calculation Exercise
07 Jul 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
In this exercise students are required to obtain the appropriate input and output parameters to extract the small signal h-parameters in common-base configuration. Afterwards they need to derive the h-parameters in common-emitter configuration in terms of the h-parameters in the common base...
PCPBT: Problem Assignment for Asymmetric Barriers
24 Jun 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This example demonstrates to the students that for non-symmetric barriers which arise due to the imperfection of the molecular beam epitaxy process there is a reduction in the transmission coefficient and therefore current.
BJT Lab: Theoretical Exercises
These two theoretical exercises are designed for the purpose of teaching the students the contribution of different current components for various modes of BJT transistor operation and also to understand how to examine and extract important BJT parameters from the device output characteristics.
PN Junction Lab Exercise: Short vs. Long Diode
This exercise examines the behavior of short vs. long diodes.
PN Junction Lab Exercise: Non-Idealities in a PN Diode
This exercise explores the behavior of a non-ideal diode in which the generation-recombination mechanisms in the depletion region, high levels of injection, and series resistance effects can significantly affect the diode behavior.
PCPBT Exercise - Symmetric Barriers
23 Jun 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise explores the nature of the quasi-bound states in a symmetric double barrier structure and how the broadening and the position of the quasi-bound states varies with the hidth and the height of the barriers.
Band Structure Lab: First-Time User Guide
15 Jun 2009 | Teaching Materials | Contributor(s): Abhijeet Paul, Benjamin P Haley, Gerhard Klimeck
This document provides useful information about Band Structure Lab. First-time users will find basic ideas about the physics behind the tool such as band formation, the Hamiltonian description, and other aspects. Additionally, we provide explanations of the input settings and the results of the...
Periodic Potential Lab: First-Time User Guide
07 Jun 2009 | Teaching Materials | Contributor(s): Abhijeet Paul, Benjamin P Haley, Gerhard Klimeck, SungGeun Kim, Lynn Zentner
This document provides guidance to first-time users of the Periodic Potential Lab tool. It offers basic information about solutions to the Schröedinger Equation in case of periodic potential in 1 dimension (1D). This document also contains suggested exercises to help users run the tool and...
Piece-Wise Constant Potential Barriers Tool: First-Time User Guide
01 Jun 2009 | Teaching Materials | Contributor(s): Samarth Agarwal, Gerhard Klimeck
This supporting document for the Piece-Wise Constant Potential Barriers Tool serves as a first-time user guide. Some basic ideas about quantum mechanical tunneling are introduced in addition to how device geometry influences tunneling probability. The transfer matrix and tight-binding...
Resonant Tunneling Diode Simulation with NEGF: First-Time User Guide
This first-time user guide for Resonant Tunneling Diode Simulation with NEGF provides some fundamental concepts regarding RTDs along with details on how device geometry and simulation parameters influence current and charge distribution inside the device.NCN@Purdue
Crystal Viewer Tool: First-Time User Guide
01 Jun 2009 | Teaching Materials | Contributor(s): Abhijeet Paul, Benjamin P Haley, Gerhard Klimeck
This first-time user guide is an introduction to the Crystal Viewer Tool lab. It provides basic definitions, including a definition of crystals. Any suggestions for changes and corrections are welcomed.